Overseaming machine



June 4, 1929. ij 1,715,373

' OVERSEAMING MACHINE Filed Ma 11; 1927 5 Sheets-Sheet 1 JZQ/ v 2/ 42 49 4 a NVENTOR Wad/ W Wnv- 4 ATTORNEY June 4, 1929.

M. KOHLER OVERSEAMING. MACHINE 3- Sheets-Sheet Filed May 11, 1927 INVENTOR M 4 [1/ ATTORNEY June 4, 1929. KdHLER 1,715,373

OVERSEAMING MACHINE Filed May 11, 1927 5 Sheets-Sheet 3 Jzijl z INVENTOR W/ W 4 ATTORNEY Patented. June 4, 1929.

MAX KoHLnR, or LIMBAGH, GERMANYJY ovERsEAMInG MACHINE.

Application filed-May 11,

The present invention relates to an improvement in overseaming machines. One object thereof has been to provide a machine in which the work supporting and feeding devices are so positioned that the operator may more freely have access thereto in placing and removing articles upon which work is to liedone. Thus, in well known types of overseaming machines it is common to have the cylindrical feed cups supported upon suitable uprights underlying the respective cups so that, when a garment is placed in position between the cups, it is necessary for the operator to reach around the outer cup support in placing or remov-, ing the garment Furthermore, this type of machine presents some difliculties inextremely rapid operation which it is believed will be overcome or minimized in a machine employing the features of construction embodied in my improved form of device. These and other advantages will become more apparent upon further consideration ofthe appended description and illustration of one form of my invention which is shown in the drawings wherein Figure 1 is a front View, Figure 2, a top plan view, 7 V Figure 3, a detail section on the line 3-3 of Figure 2, and

Figure 4, a side view. 7 Referring to the drawings, an overseam- 1118' machine embodying my invention inof any suitable well known type. The shaft 3 carries an eccentric cam 5 and transmits endwise motion to a link 6 connected ,to said cam 5 by means of a strap 7 A lever 8 is pivotally mounted in the housing 1 at. 9 and is connected at its upper end to the link 6 and at its lower end to a rod 10 which in turn I actuates a suitable intermittent or step-bystep shaft feeding device 11, being connected thereto by means of a ball and socket omt- 12, Figure 1. As indicated more clearly in Figure 4:, an inner cylindrical feed cup 13.

is secured-to a shaft 14 driven by the intermittent feeding device 11. A gear 15 on said shaft 14: meshes with a gear 16 011 an upright shaft 17 journaled at one end in a portion of the extension 2 and at the other 1927. Serial no. 190,479.

T v orr csf 1 tudinal axes of shafts 14 and 17 remain-in fixed parallel relation. A gear'19 is mounted at the upper end ofshaft 17- and preferably within a suitable housing or box20 supported on the bracket 18. In Figure 2, the box 20 e is shown with the top or cover plate removed, while in Figure 4 a cover plate 21 18 shown in operative position. A stud shaft 22 is journaled in the box 20 and carries a worm gear 23 in operative relation to the 'Outer. cup 25 which cooperates with the cup 13 to retain articles in position for the over-= articles seaming operationand to feed said step by step. r

In the form of my inventionillustrated in 1 the drawings, the'outer feed cup 25 is mounted so that it may be moved away from. or

toward the cooperating cup 13in such a Way that the angular relation between the peripheral surfaces of said cups will not be altered. In well knownforms ofloverseam ing machines the outer cup is supported upon a tilting column sothat, when said cup is moved away from the inner'cup, the central .I

axis thereof will be disposed atan angle to. the central axis of the inner cup. I In my improved construction, the central axes of bothcups'remain parallel in all positions.-

In order to support the outer cup in such a way as to produce the'contemplated results,

I provide a bracket 26 positioned at one side f,

of the housing 1 and having a recess which". affords spaced bearings for aslidable rod 27.

A head 28 is mounted on the forwardend of. said rod 27 and a guide and stop member 29 is secured to the rear end thereof and in I position to be actuated by the freeend of'a bell crank lever 30 pivoted at31 and actuated by any suitable means either manuallv or.

by foot power. In the illustrated form of device bell crank lever 30 is connected to suitable foot operated mechanism,not shown, by means'of a'link 32, a lever 33. and a link 34.

The recess in the enlarged portion of bracket 26 has a shoulder 35-against which is seated so that the rod 27 and the head 28 are held normally in retracted position by reason of the expansion pressure of said spring 36.

As indicated more clearly in Figure l, the guide and stop member 29, is provided with an open-ended slot 38, positioned to engage a guide rod 39 projecting rearwardly from the bracket 26. The slotted end of the memher 29 engaging said rod 39 prevents tilting or pivotal movement of the head 28. The member 29 also carries a set screw 40 which is movable to permit adjustment of the length of stroke of the rod 27 vIn other words, ad-

justment of the set screw 40 willpermit a greater or less movement of separationbetween the cups, 13- and. 25 depending upon thecoarseness or fineness of the fabric or other art cle upon Wl11Cl1 the overseaming operation is to be performed.

Referring more particularly to Figure 2,.

the head 28 carries a box 41 shown in said figure With-the cover removed and in Figure 4 with the cover 42 in operative position. One

end ofa stud shaft 43 is journaled in the front; wall oflbox 41 .while the other end of said in the head 28 and carrying at its lower end the outer cup-25. V

In operatiomthe main shaft?) is driven from any suit-able sourceof power such as a motor and belt, not shown, engaging the pulley 4. To insert a knitted fabric or other article to be overseamed, the operator presses down on a treadle mechanism, not shown,

to deflect forwardly the lower or free end of the bell crank lever 30'. This motion imparts sliding movement tothe rod 27, thus carrying-forward the head 28 and the driving mechanism of cup 25 mounted thereon. The operatorenow has unobstructed access to the space betweenthe-feeding cupsand can therefore readily and accurately position the fab ricor other'dcvice to receive the overseaming loops. It'willbe' apparent thatwith free ac cess as described,- articles of considerable size and varied contour can be conveniently operated on,.-wher'eas in known types of machines of this character the space between the'feed cup support-s quite definitely limits use of the machine in these respects. lVhen'foot pressure is released from the. treadle, spring 86 Shaft 43' presses rod 27 rearwardly and with it the head 28 and the cup 25, thus, securing the article or fabric in feeding position between said cup and the inner cup 18. The machine 7 is now drivenby mainshaft 3 which operates the needle and loop mechanism in a known manner and through suitable connections also actuates the cups 13 and 25. Thus, reciprocative movement is imparted to the'rod 10 by means of the lever 8 which is operatively connected to the'main shaft-3-as hereinabove described. This endwise to-and-fromotion of rod 10 is translated into intermittent ro'-' tation of the shaft 14 to which cup 13 is secured. Shaft 17 which at all times remains in parallel-relation to shaft 14- is operatively connected to shaft 14 through gear. 16 and transmits the step-by-step rotation of said shaft to the stud shaft/22 from which said motionis in turn transmitted to the cup 25 by means heretofore described in detail.

hereinabove described is also equipped with suitable guiding devices for the articles to be ingdevices and other suitable or necessary mechanlcal ad uncts usually or frequently found in machines of "this character, al-

It Will be understoodthat the machine overseamedj as well as with thread tension though they form no part of the present in- I vention and are therefore not separately shown and described. I claim as my invention Ina sewing machine, the combination of a housing, an inner feed cup, intermittent driving means for said inner cup, abracket at one side of said housing, a cup supporting head slidably mountedin said bracket, an out-' er cup mounted on saidhead a'nd-inovable there-with toward and away from said inner cup, a casing at another side of said housing, a cross shaft in said casing, an upright shaft operatively connected with said intermittent outer cup driving shaft mounted in said cup driving means and with said cross shaft, an

supporting head, and a second cross shaft mounted in said head and 'operatively con-- nected with said outer cup driving shaft, one

of said cross shafts being providedwith a, longitudinal slot and the other with a slotengaging lug to form a driving connection between saldcross shafts at all operating, positions of said outer cup relatively to said inv In testimony whereof lhave signed my ner cup;

name to this specification this2l day of April,

MAX KOHLER. 

